Granted Patent
Utility
US 4,836,731 · App. 07/164,788
Method and apparatus for cubing stones of diverse geometries
Inventor:
Daniel P. Abrahamson
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Mar 7, 1988
Inventor
Daniel P. Abrahamson
Assignee (at issue)
Builders Equipment Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.